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    <div class="refentry" id="glGetActiveAtomicCounterBufferiv">
      <div class="titlepage"/>
      <div class="refnamediv">
        <h2>Name</h2>
        <p>glGetActiveAtomicCounterBufferiv — retrieve information about the set of active atomic counter buffers for a program</p>
      </div>
      <div class="refsynopsisdiv">
        <h2>C Specification</h2>
        <div class="funcsynopsis">
          <table style="border: 0; cellspacing: 0; cellpadding: 0;" class="funcprototype-table">
            <tr>
              <td>
                <code class="funcdef">void <strong class="fsfunc">glGetActiveAtomicCounterBufferiv</strong>(</code>
              </td>
              <td>Gluint <var class="pdparam">program</var>, </td>
            </tr>
            <tr>
              <td> </td>
              <td>GLuint <var class="pdparam">bufferIndex</var>, </td>
            </tr>
            <tr>
              <td> </td>
              <td>GLenum <var class="pdparam">pname</var>, </td>
            </tr>
            <tr>
              <td> </td>
              <td>GLint *<var class="pdparam">params</var><code>)</code>;</td>
            </tr>
          </table>
          <div class="funcprototype-spacer"> </div>
        </div>
      </div>
      <div class="refsect1" id="parameters">
        <h2>Parameters</h2>
        <div class="variablelist">
          <dl class="variablelist">
            <dt>
              <span class="term">
                <em class="parameter">
                  <code>program</code>
                </em>
              </span>
            </dt>
            <dd>
              <p>
                    The name of a program object from which to retrieve information.
                </p>
            </dd>
            <dt>
              <span class="term">
                <em class="parameter">
                  <code>bufferIndex</code>
                </em>
              </span>
            </dt>
            <dd>
              <p>
                    Specifies index of an active atomic counter buffer.
                </p>
            </dd>
            <dt>
              <span class="term">
                <em class="parameter">
                  <code>pname</code>
                </em>
              </span>
            </dt>
            <dd>
              <p>
                    Specifies which parameter of the atomic counter buffer to retrieve.
                </p>
            </dd>
            <dt>
              <span class="term">
                <em class="parameter">
                  <code>params</code>
                </em>
              </span>
            </dt>
            <dd>
              <p>
                    Specifies the address of a variable into which to write the retrieved information.
                </p>
            </dd>
          </dl>
        </div>
      </div>
      <div class="refsect1" id="description">
        <h2>Description</h2>
        <p>
            <code class="function">glGetActiveAtomicCounterBufferiv</code> retrieves information about the set of active
            atomic counter buffers for a program object. <em class="parameter"><code>program</code></em> is the name of a program
            object for which the command <a class="citerefentry" href="glLinkProgram.xhtml"><span class="citerefentry"><span class="refentrytitle">glLinkProgram</span></span></a>
            has been issued in the past. It is not necessary for <em class="parameter"><code>program</code></em> to have been linked
            successfully. The link may have failed because the number of active atomic counters exceeded the limits.
        </p>
        <p>
            <em class="parameter"><code>bufferIndex</code></em> specifies the index of an active atomic counter buffer and must be in
            the range zero to the value of <code class="constant">GL_ACTIVE_ATOMIC_COUNTER_BUFFERS</code> minus one. The value
            of <code class="constant">GL_ACTIVE_ATOMIC_COUNTER_BUFFERS</code> for <em class="parameter"><code>program</code></em> indicates the
            number of active atomic counter buffer and can be queried with
            <a class="citerefentry" href="glGetProgram.xhtml"><span class="citerefentry"><span class="refentrytitle">glGetProgram</span></span></a>.
        </p>
        <p>
            If no error occurs, the parameter(s) specified by <em class="parameter"><code>pname</code></em> are returned in <em class="parameter"><code>params</code></em>.
            If an error is generated, the contents of <em class="parameter"><code>params</code></em> are not modified.
        </p>
        <p>
            If <em class="parameter"><code>pname</code></em> is <code class="constant">GL_ATOMIC_COUNTER_BUFFER_BINDING</code>, then the index of the
            counter buffer binding point associated with the active atomic counter buffer <em class="parameter"><code>bufferIndex</code></em>
            for <em class="parameter"><code>program</code></em> is returned.
        </p>
        <p>
            If <em class="parameter"><code>pname</code></em> is <code class="constant">GL_ATOMIC_COUNTER_BUFFER_DATA_SIZE</code>, then the implementation-dependent
            minimum total buffer object size, in baseic machine units, required to hold all active atomic counters in the
            atomic counter binding point identified by <em class="parameter"><code>bufferIndex</code></em> is returned.
        </p>
        <p>
            If <em class="parameter"><code>pname</code></em> is <code class="constant">GL_ATOMIC_COUNTER_BUFFER_ACTIVE_ATOMIC_COUNTERS</code>, then the number of active
            atomic counters for the atomic counter buffer identified by <em class="parameter"><code>bufferIndex</code></em> is returned.
        </p>
        <p>
            If <em class="parameter"><code>pname</code></em> is <code class="constant">GL_ATOMIC_COUNTER_BUFFER_ACTIVE_ATOMIC_COUNTER_INDICES</code>,
            then a list of the active atomic counter indices for the atomic counter buffer identified by <em class="parameter"><code>bufferIndex</code></em>
            is returned. The number of elements that will be written into <em class="parameter"><code>params</code></em> is the value of
            <code class="constant">GL_ATOMIC_COUNTER_BUFFER_ACTIVE_ATOMIC_COUNTERS</code> for <em class="parameter"><code>bufferIndex</code></em>.
        </p>
        <p>
            If <em class="parameter"><code>pname</code></em> is <code class="constant">GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_VERTEX_SHADER</code>,
            <code class="constant">GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_TESS_CONTROL_SHADER</code>,
            <code class="constant">GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_TESS_EVALUATION_SHADER</code>,
            <code class="constant">GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_GEOMETRY_SHADER</code>,
            <code class="constant">GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_FRAGMENT_SHADER</code>,
            <code class="constant">GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_COMPUTE_SHADER</code> then a boolean value indicating
            whether the atomic counter buffer identified by <em class="parameter"><code>bufferIndex</code></em> is referenced by the vertex,
            tessellation control, tessellation evaluation, geometry, fragment or compute processing stages of <em class="parameter"><code>program</code></em>,
            respectively, is returned.
        </p>
      </div>
      <div class="refsect1" id="notes">
        <h2>Notes</h2>
        <p>
            <code class="function">glGetActiveAtomicCounterBufferiv</code> is available only if the
            GL version is 4.2 or higher.
        </p>
        <p>
            <code class="constant">GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_COMPUTE_SHADER</code> is available
            only of the GL version is 4.3 or higher.
        </p>
      </div>
      <div class="refsect1" id="errors">
        <h2>Errors</h2>
        <p>
            <code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>program</code></em> is not the name of a program
            object for which <a class="citerefentry" href="glLinkProgram.xhtml"><span class="citerefentry"><span class="refentrytitle">glLinkProgram</span></span></a> has been called in the past.
        </p>
        <p>
            <code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>bufferIndex</code></em> is greater than or equal to
            the value of <code class="constant">GL_ACTIVE_ATOMIC_COUNTER_BUFFERS</code> for <em class="parameter"><code>program</code></em>.
        </p>
        <p>
            <code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>pname</code></em> is not one of the accepted tokens.
        </p>
      </div>
      <div class="refsect1" id="versions">
        <h2>Version Support</h2>
        <div class="informaltable">
          <table style="border-collapse: collapse; border-top: 2px solid ; border-bottom: 2px solid ; border-left: 2px solid ; border-right: 2px solid ; ">
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              <col style="text-align: center; "/>
              <col style="text-align: center; "/>
              <col style="text-align: center; "/>
              <col style="text-align: center; "/>
              <col style="text-align: center; " class="lastvers"/>
            </colgroup>
            <thead>
              <tr>
                <th style="text-align: left; border-right: 2px solid ; ">
                 
            </th>
                <th style="text-align: center; border-bottom: 2px solid ; " colspan="12">
                <span class="bold"><strong>OpenGL Version</strong></span>
            </th>
              </tr>
              <tr>
                <th style="text-align: left; border-right: 2px solid ; border-bottom: 2px solid ; ">
                <span class="bold"><strong>Function / Feature Name</strong></span>
            </th>
                <th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
                <span class="bold"><strong>2.0</strong></span>
            </th>
                <th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
                <span class="bold"><strong>2.1</strong></span>
            </th>
                <th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
                <span class="bold"><strong>3.0</strong></span>
            </th>
                <th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
                <span class="bold"><strong>3.1</strong></span>
            </th>
                <th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
                <span class="bold"><strong>3.2</strong></span>
            </th>
                <th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
                <span class="bold"><strong>3.3</strong></span>
            </th>
                <th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
                <span class="bold"><strong>4.0</strong></span>
            </th>
                <th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
                <span class="bold"><strong>4.1</strong></span>
            </th>
                <th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
                <span class="bold"><strong>4.2</strong></span>
            </th>
                <th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
                <span class="bold"><strong>4.3</strong></span>
            </th>
                <th style="text-align: center; border-right: 2px solid ; border-bottom: 2px solid ; ">
                <span class="bold"><strong>4.4</strong></span>
            </th>
                <th style="text-align: center; border-bottom: 2px solid ; ">
                <span class="bold"><strong>4.5</strong></span>
            </th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td style="text-align: left; border-right: 2px solid ; ">
                  <code class="function">glGetActiveAtomicCounterBufferiv</code>
                </td>
                <td style="text-align: center; border-right: 2px solid ; ">-</td>
                <td style="text-align: center; border-right: 2px solid ; ">-</td>
                <td style="text-align: center; border-right: 2px solid ; ">-</td>
                <td style="text-align: center; border-right: 2px solid ; ">-</td>
                <td style="text-align: center; border-right: 2px solid ; ">-</td>
                <td style="text-align: center; border-right: 2px solid ; ">-</td>
                <td style="text-align: center; border-right: 2px solid ; ">-</td>
                <td style="text-align: center; border-right: 2px solid ; ">-</td>
                <td style="text-align: center; border-right: 2px solid ; ">✔</td>
                <td style="text-align: center; border-right: 2px solid ; ">✔</td>
                <td style="text-align: center; border-right: 2px solid ; ">✔</td>
                <td style="text-align: center; ">✔</td>
              </tr>
            </tbody>
          </table>
        </div>
      </div>
      <div class="refsect1" id="seealso">
        <h2>See Also</h2>
        <p>
            <a class="citerefentry" href="glGetProgram.xhtml"><span class="citerefentry"><span class="refentrytitle">glGetProgram</span></span></a>,
            <a class="citerefentry" href="glGetActiveSubroutineUniform.xhtml"><span class="citerefentry"><span class="refentrytitle">glGetActiveSubroutineUniform</span></span></a>,
            <a class="citerefentry" href="glGetActiveSubroutineUniformName.xhtml"><span class="citerefentry"><span class="refentrytitle">glGetActiveSubroutineUniformName</span></span></a>,
            <a class="citerefentry" href="glGetUniformLocation.xhtml"><span class="citerefentry"><span class="refentrytitle">glGetUniformLocation</span></span></a>
        </p>
      </div>
      <div class="refsect1" id="Copyright">
        <h2>Copyright</h2>
        <p>
            Copyright <span class="trademark"/>© 2011-2014 Khronos Group.
            This material may be distributed subject to the terms and conditions set forth in
            the Open Publication License, v 1.0, 8 June 1999.
            <a class="link" href="http://opencontent.org/openpub/" target="_top">http://opencontent.org/openpub/</a>.
        </p>
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